public static void MakeNodeBlack <K, V, N>(this RedBlackTreeNodeBase <K, V, N> node) where N : RedBlackTreeNodeBase <K, V, N> { if (node != null) { node.Color = RedBlackTreeNodeColor.Black; } }
public static bool IsBlack <K, V, N>(this RedBlackTreeNodeBase <K, V, N> node) where N : RedBlackTreeNodeBase <K, V, N> => node == null || node.Color == RedBlackTreeNodeColor.Black;
public static bool IsRed <K, V, N>(this RedBlackTreeNodeBase <K, V, N> node) where N : RedBlackTreeNodeBase <K, V, N> => node != null && node.Color == RedBlackTreeNodeColor.Red;